It's not likely that your face will hit the wheel if you are buckled up, HOWEVER it is very likely that the airback will give you black eyes and the powder its packed with will burn your face and arms. I'm not saying this is a reason to get rid of them, they do far more good then harm, but an airbag deploying still won't leave you with a "pretty" face. (And your face stretches the definition of pretty anyways. )

The airbag could also break your arm... right after it drives it into your face, breaking your nose in the process. Hands at 10 and 2, not one hand at 12 like I see far too often.